IIRC Foxconn built the Wisconsin factory was symbolic and kind of built almost as a favor. They even changed the ground-breaking date to accommodate Trump being there.

Point being that no, I don't think one $10 billion plant is indicative of any real kind of economic shift, any more than $5 billion spent by Apple on factories is turning the tide of manufacturing offshoring.

The Pearl River Delta has an enormous ecosystem of factories, companies and deeply interconnected supply chains valued in the trillions and both this factory and anything Apple build will be heavily reliant upon it for components, whereas vice versa is not the case.